1.Start OpenCPN and put a marker where you want to go.
2.Click on the marker and read the geo loc in the Mark/WP Properties
3.Start GE and enter the markers geo loc.
4.Hold down CTRL and press the minimized OpenCPN button until it goes black.
5.Right click on either minimized button and select 'Show windows side by side'

You now have two identical,independent windows at the same world location.
The windows are not synchronized so you have to zoom in and out independently.

If you wish to save your GE view for a later occation,I recommend using this great little program which creates KML files which you can later execute with a click. (replaces steps 2-3. above) Just copy the geo locs you entered in GE or from the OpenCPN marker.

Sounds like a great combination.. I downloaded the MMG utility but I must confess I am a little lost as to how to set it up in OpenCpn-Google Earth. I am using Virtual SerialPorts from Etherlogic by the way and also normally virtual COM:7 for my incoming AIS source.

P.S. Would be ideal to place a waypoint marker in OpenCPN at the location desired and have it's geo loc passed automatically to KML Creator for the creation of the .kml file which could then execute automatically.

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__________________"And all I ask is a tall ship and a star to steer her by."